I used something similar (provigil) for only a couple of weeks, as I didn't like the way I felt. I would say to give it a try, but pay close attention to how it makes you feel, not just the benefits.
Here, LymeMD blog talks about
it, near the bottom of this post:
lymemd.blogspot.com/2012/07/fatigue-in-complicated-patient.html And this might be helpful for your budget:
"Provigil (modafinil) and Nuvigil (armodafinil) are stimulant-like drugs used to treat excessive sleepiness. There are generics available for Provigil but not for Nuvigil. They are manufactured by the same company (Cephalon) and have the same effects."
http://www.diffen.com/difference/Nuvigil_vs_Provigil